Rheological and anti-microbial study of silica and silver nanoparticles-reinforced k-carrageenan/hydroxyethyl cellulose composites for food packaging applications
Sustainable food packaging films were developed using a combination of k-Carrageenan (k-C), hydroxyl ethyl cellulose (HEC), silicon dioxide (SiO 2 ), and silver (Ag) nanoparticles. The CH-SiO 2 /Ag nanocomposites showed promising results, mainly due to their transparency, flexibility, low cost, and...
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Published in | Cellulose (London) Vol. 28; no. 9; pp. 5577 - 5590 |
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Main Authors | , , , |
Format | Journal Article |
Language | English |
Published |
Dordrecht
Springer Netherlands
01.06.2021
Springer Nature B.V |
Subjects | |
Online Access | Get full text |
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Summary: | Sustainable food packaging films were developed using a combination of k-Carrageenan (k-C), hydroxyl ethyl cellulose (HEC), silicon dioxide (SiO
2
), and silver (Ag) nanoparticles. The CH-SiO
2
/Ag nanocomposites showed promising results, mainly due to their transparency, flexibility, low cost, and environmental friendliness. The structure and uniform morphology of the CH-SiO
2
/Ag nanocomposites were determined by FT-IR, XRD, and SEM analysis. Barrier properties (water vapor permeability-WVP), thermal properties (T
5%
loss, char yield), and mechanical properties determined for the k-C/HEC and k-C/HEC-SiO
2
/Ag nanocomposites, which improved by 3.3–1.9 × 10
−9
gm/m
2
Pa s (WVP), 59.1–115.7 °C (T
5%
), 13.4–29.3% (char yield), 23.8–41.5 MPa (tensile strength), and 22.3–28.9 (EB), respectively. The contact angle of the k-C/HEC-SiO
2
/Ag nanocomposites were in the range of 60.1°–76.4°. The UV transmittance of the k-C/HEC composites decreased with the addition of SiO
2
and Ag nanoparticles. However, the transparency of the composites was not affected, and it inhibited UVA and UVB rays by the addition of Ag nanoparticles. The viscosity of the k-C/HEC composites increased with the SiO
2
content and decreased with the shear rate. All the composites exhibited shear-thinning behavior. The storage modulus of the prepared composites is higher than the loss modulus in the entire frequency region. Overall, SiO
2
and Ag nanoparticles improved the hydrophobic nature of the k-C/HEC-SiO
2
/Ag films and showed significant activity against six common food pathogens,
Staphylococcus aureus, Bacillus cereus, Listeria monocytogenes, Bacillus subtilis, Salmonella typhi, and Cronobacter sakazakii
. The synergistic combination of k-C/HEC-SiO
2
/Ag nanocomposite has potential candidate for packaging and other biomedical applications. |
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ISSN: | 0969-0239 1572-882X |
DOI: | 10.1007/s10570-021-03873-z |